Construction of the first stage of this 19th-century Sydney landmark began in 1868 and subsequent stages including the clock tower 1873 and stage two took place between 1884 and 1889. The building is of exceptional heritage significance and is one of the finest examples of High Victorian Second Empire style in the country.
In 2013, HBS Group began façade conservation of the north and south façades of the Vestibule building and a quantum of the north face of the Centennial Hall building.
Use of gantry and scaffold in all three stages involved an innovative design to ensure the public domain was not affected during restoration of the town hall.
Use of a scaffold wrap that replicated the building façade.
Forming the water catchment controls and water treatment area. This was created underneath the scaffolds or on top of the various hoardings prior to any scaffold being built.
Stone replacement, carved stone and indents fixed within a 1mm range.
Sourced, selected and procured the 200 George St sandstone ensuring the new sandstone was selected on its quality and likeness to the original.
Perfectly replicated the elaborately decorated fine carving on the exterior of the Vestibule building.
Raked out the existing asbestos-contained pointing, and repointing of the entire façade.
Applied asbestos-removal protection and air monitoring set up to contain any airborne fibres.
Repairs to chimneys and tempietto’s.
Seismic stabilisation works to some of the roof elements. Façade Gommage® clean to the George St pediment.
Installation of new lead weatherings on cornices, sting courses, copings and capitals using original techniques, ensuring each piece was measured, moulded and fixed in place.
Window conservation of the gallery stairwell window, Captain Cook windows and the basement copper light window. This included: removal of exterior cover glass, installation of new stainless steel wire mesh screens, excavation of two windows for bench repairs, cleaning of glass both internal and external, resoldering broken solder joints, glass repair and replacement, treatment of ferramenta for rust abatement and repainting, replacement of copper wire ties to saddle bars and recementing of window panels.